---
description: Detection IDs and user agents for major AI crawlers.
title: Bot reference
image: https://developers.cloudflare.com/og-docs.png
---

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> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/ai-crawl-control/llms.txt  
> Use this file to discover all available pages before exploring further.

# Bot reference

Last updated Aug 31, 2026|Copy as Markdown| [View as Markdown](https://4da580d2.previews.developers.cloudflare.com/ai-crawl-control/reference/bots/index.md)| [Agent setup](https://4da580d2.previews.developers.cloudflare.com/agent-setup/)

A selection of crawlers from major AI operators. For an up-to-date list of verified bots, see the [Cloudflare Radar Bots Directory ↗](https://radar.cloudflare.com/bots/directory).

| Crawler | Operator | Category | Detection IDs | User Agent |
| --- | --- | --- | --- | --- |
| GPTBot | OpenAI | AI Crawler | `123815556`, `33563875` | `GPTBot` |
| ChatGPT-User | OpenAI | AI Assistant | `132995013`, `33563857` | `ChatGPT-User` |
| OAI-SearchBot | OpenAI | AI Search | `126255384`, `33563986` | `OAI-SearchBot` |
| ClaudeBot | Anthropic | AI Crawler | `33563859` | `ClaudeBot` |
| Claude-SearchBot | Anthropic | AI Search | `33564301` | `Claude-SearchBot` |
| Claude-User | Anthropic | AI Assistant | `33564303` | `Claude-User` |
| PerplexityBot | Perplexity | AI Search | `33563889` | `PerplexityBot` |
| Perplexity-User | Perplexity | AI Assistant | `33564371` | `Perplexity-User` |
| Googlebot | Google | Search Engine | `120623194`, `33554459` | `Googlebot` |
| Google-CloudVertexBot | Google | AI Crawler | `133730073`, `33564321` | `Google-CloudVertexBot` |
| BingBot | Microsoft | Search Engine | `117479730`, `33554461` | `bingbot` |
| Bytespider | ByteDance | AI Crawler | `33563853` | `Bytespider` |
| CCBot | Common Crawl | AI Crawler | `133621792`, `33563855` | `CCBot` |
| Meta-ExternalAgent | Meta | AI Crawler | `124581738`, `33563982` | `meta-externalagent` |
| Meta-ExternalFetcher | Meta | AI Assistant | `132272919`, `33563980` | `meta-externalfetcher` |
| FacebookBot | Meta | AI Crawler | `33563972` | `FacebookBot` |
| Applebot | Apple | AI Search | `120424214`, `33563845` | `Applebot` |
| Amazonbot | Amazon | AI Crawler | `118601807`, `33563839` | `Amazonbot` |
| DuckAssistBot | DuckDuckGo | AI Assistant | `126666910`, `33564037` | `DuckAssistBot` |
| MistralAI-User | Mistral | AI Assistant | `128950951`, `33564323` | `MistralAI-User` |

Note

[Bot Management](https://4da580d2.previews.developers.cloudflare.com/bots/get-started/bot-management/) customers can use `cf.bot_management.detection_ids` in [WAF custom rules](https://4da580d2.previews.developers.cloudflare.com/waf/custom-rules/). All other plans can use user agent matching in robots.txt or WAF rules.

## Referrer domains by operator

When visitors arrive at your site from an AI platform, the referrer

 indicates which operator's service sent them.

| Operator | Domains |
| --- | --- |
| OpenAI | `openai.com`, `chatgpt.com` |
| Anthropic | `anthropic.com`, `claude.ai` |
| Perplexity | `perplexity.ai` |
| Google | `google.com`, `youtube.com` |
| Microsoft | `bing.com`, `msn.com`, `microsoft.com` |
| Meta | `facebook.com`, `instagram.com`, `whatsapp.com`, `meta.com` |
| DuckDuckGo | `duckduckgo.com`, `duck.com` |
| ByteDance | `bytedance.com`, `tiktok.com` |
| Apple | `apple.com`, `icloud.com` |
| Amazon | `amazon.com`, `alexa.com` |

## Related

- [Analyze AI traffic](https://4da580d2.previews.developers.cloudflare.com/ai-crawl-control/features/analyze-ai-traffic/) — View crawler activity in the dashboard
- [GraphQL API reference](https://4da580d2.previews.developers.cloudflare.com/ai-crawl-control/reference/graphql-api/) — Query crawler analytics
- [Cloudflare Radar Bots Directory ↗](https://radar.cloudflare.com/bots/directory) — Up-to-date list of verified bots

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